body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, button, textarea, p, blockquote, th, td {
  margin: 0;
  padding: 0;
}

html {
  font: 14px/1.5 "PingFang SC", "微软雅黑", "Microsoft YaHei", Helvetica, "Helvetica Neue", Tahoma, Arial, sans-serif;
  color: #1c1f21;
}

body {
  background: #f5f5f5;
}

a {
  text-decoration: none;
  -webkit-appearance: none;
}



.block {
  display: block;
}
.pull-left {
  float: left;
}
.pull-right {
  float: right;
}

.text-center {
  text-align: center;
}